151 


uc- 


YD  2.7399 


LIBRARY 

OF    THE 

UNIVERSITY  OF  CALIFORNIA. 
Class 


A  PLAT  AND   PROFILE   BOOK 


FOR 


CIVIL    ENGINEERS    AND    CONTRACTORS 


PUBLISHED    BY 

THE   ENGINEERING   NEWS   PUBLISHING   COMPANY 

NEW    YORK 
1899 


The  Forman-Bassett-Hatch  Co.,    Engravers  and  Printers,    Cleveland,    Ohio 


GENERAL 


Copyright,  1882  and  1899 

BY 
H.  F.  DUNHAM 


IN  the  construction  of  railways  and  public  works,  much  valuable  time  is  lost  in  looking 
through  transit  and  level  books,  and  in  referring  to  office  plans  and  profiles  for  notes 
and  data  that  must  be  frequently  used  in  the  field.  This  profile  book,  convenient  for 
mapping  to  scale  (400  feet  per  inch,)  and  recording  notes  of  alinement,  right  of  way, 
reference  points,  bench  marks,  etc.,  which  in  the  work  of  construction  are  no  less  important 
than  the  profile  itself,  has  been  used  for  many  years.  The  tables  copied  from  "Trautwine's" 
and  "Kent's"  valuable  "Pocket  Books"  are  inserted  for  reference  in  the  field  and  for 
the  convenience  of  contractors,  who  will  find  the  left  hand  pages  of  the  book  of  much 
service  for  noting  amounts  of  estimates  and  dates  of  sub-contracts.  The  paper  used  is  of 
such  quality  and  thickness  that  the  vertical  lines  show  in  the  following  page  and  furnish 
a  convenient  horizontal  scale  for  mapping  the  alinement. 


BXI.UMT 

Table  of  cubic  yards  of  ballast  per  mile  of  road. 

Side-slope  of  the 

EXCAVATION     AND     EMBANKMENT     TABI^E 

ballast  1  to  1. 

Width  in  clear  between  two  tracks  six  feet. 

Top  Width,  Single  Track 

Top  Width,  Double  Track 

Inches 

10  Ft. 

11  Ft. 

12  Ft. 

21  Ft. 

22  Ft, 

23  Ft. 

Height 

Base 

12  feet 

Base 
16  fuet 

Base 
14  feet 

Base 
20  feet 

Base 
24  feet 

Base 
28  feet 

Height 

Base 
12  feet 

Base 
16  feet 

Base 
14  feet 

Base 
20  feet 

Base 
24  feet 

Base 
28  feet 

12 

Cu.  yds. 
2152 

Cu.  yds. 
2347 

Cu.  yds. 
2543 

Cn.  yds. 
4303 

Cu.  yds. 
4499 

Cu.  yds. 
4695 

18 

3374 

3667 

3960 

6600 

6894 

7188 

in  Feet 

Cu. 

yds. 

Cu. 
yds. 

Cu. 
yds. 

Cu. 
yds. 

Cu. 
yds. 

Cu. 

yds. 

in  Feet 

Cu. 
yds. 

Cu. 

yds. 

Cu. 
yds. 

Co. 
yds. 

Cu. 

yds. 

Cu. 
yds. 

90 

6111 

6600 

7087 

11490 

11980 

12470 

K.. 

24 
50 

31 
65 

27 
57 

38 

80 

46 
94 

53 
109 

18  .. 
19  .. 

2,600 
2,850 

2,867 
3,131 

2,733 
2,991 

3,133 
3,413 

3,400 
3,694 

3,667 
3,976 

TIES 

In  the  United  States  the  life  of  a  tie  is  about  as  follows  : 

IK  

79 

101 

90 

124 

146 

168 

20  .. 

3.111 

3,407 

3,259 

3,704 

4,000 

4,296 

Years       Av.Yrs. 

Years 

Ai.Yrs. 

2    .. 

111 

141 

126 

no 

200 

230 

21  .. 

3,383 

3,694 

3,539 

4,006 

4,317 

4,628 

5  to  12           7 

White  Oak 

5  to  12             7 

2V4.. 

146 

183 

164 

220 

257 

294 

22  .. 

3,667 

3,993 

3,830 

4,318 

4,644 

4,970 

6  to  15           9 

Spruce  Pine 

4  to   ' 

3    .. 

183 

228 

206 

272 

317 

361 

23  .. 

3,961 

4,302 

4,132 

4,643 

4,983 

5,324 

Hemlock  

...  3to 

8           5 

3!4_. 

224 

275 

249 

327 

379 

431 

24  .. 

4,267 

4,622 

4,444 

4,978 

5,333 

5,689 

4    .. 

267 

326 

296 

385 

444 

504 

25  .. 

4,583 

4,954 

4,769 

5,324 

5,694 

6,065 

R 

AILS 

I*4:: 

312 
361 

379 
435 

346 

398 

446 
509 

512 

583 

579 
657 

26  .. 

27  .. 

4,911 

5,250 

5,296 
5,650 

5,104 
5,450 

5,682 
6,050 

6,067 
6,450 

6,452 
6,850 

Tons  (2240  fcs.)  of  Rail  i  i  v   weight  of  rail     , 
per  mile  of  single  track  ~   7    *   in  ibs.  per  yard.  (o 

6    . 

7    . 
8    .. 

467 
583 
711 

556 
687 
830 

511 

635 
770 

644 
791 
948 

733 
894 
1,067 

822 
998 
1,185 

28  .. 
29  .. 
30  .. 

5,600 
5,961 
6,333 

6,015 
6,391 

6,778 

5,807 
6,176 
6,556 

6,43U 
6,820 
7,222 

6,844 

7,250 
7,667 

7,259 
7,680 
8,111 

Weight  in  pounds  per  yard  of  rail_ 

=  Area  of  rail  in  square  inches. 

10 

9    .. 
10    . 
11    . 
12    . 
13    .. 
14 
15    .. 

850 
1,000 
1,161 
1,333 
1,517 
1,711 
1,917 

983 
1,148 
1,324 
1,511 
1,709 
1,919 
2,139 

917 
1,074 
1,243 
1,422 
1.613 
1,815 
2.02S 

1,117 
1,298 
1,486 
1,689 
1,902 
2,126 
2,361 

1,250 
1,444 
1.650 
1.867 
2,094 
2,333 
2,583 

1,383 
1,593 
1,813 
2,044 
2,287 
2,541 
2,806 

35  .. 
40  .. 
45  .. 
50  .. 
60  .. 
70  .. 
80  .. 

8,361 
10,665 
13,249 
16,111 
22,667 
30,333 
39,111 

8,880 
11,258 
13,916 
16,852 
23,555 
31,370 
40,296 

8,620 
10,963 
13,583 
16,481 
23,111 
30,852 
39,704 

9,398 
11,851 
14,583 
17,593 
24,444 
32,407 
41,481 

9,917 
12,444 
15,250 
18,333 
25,333 
33,414 
42,667 

10,435 
13,037 
15,917 
19,074 
26,222 
34,481 
43,852 

PRISNIOIDA.lv     FOKMUUH 

Let  A=the  area  of  one  of  the  two  parallel  ends. 
a=the  area  of  the  other  of  the  two  parallel  ends. 
M=the  area  of  a  cross  section  midway  between,  and  parallel  to,  the 
two  parallel  ends. 
L=the  perpendicular  distance  between  the  two  parallel  ends. 

16    .. 

2,133 
2,361 

2,370 
2,613 

2,252 

2,487 

2,607 
2,865 

2,844 
3,117 

3,081 
3,368 

90  .. 
100  .. 

49,001 
60,000 

50,334 
61,481 

49,667 
60,741 

51,667 
62,963 

53,01)0 
64,444 

54,333 
65,926 

Then  Volume  = 

a  +  iM 

=  L  X  mean  area  of  cross  section. 

6 

STRENGTH     JtfiTt     WEIGHT     OF     VARIOUS     MKTERIRLS 


MATE  Rial, 


Steel,  Bessemer,  Rolled 

Iron,  Rolled,  Bars,  ordinary. 

Iron,  Cast,  ordinary 

Copper,  Rolled 


TEfSftg 

STKEXGTH 

AVERAGE 


CUUSHIM  LOAD 


Pounds  Pounds 

per  per 

Square  ,  Square 

Inch  Inch 


120,000      I  102,000 


Tons 
per 

Square 
Foot 


Weight) 

per 
Cubic 
Foot 


II.-.. 
15,000 


Oak,  White,  seasoned,  good  quality  . 

Elm,  seasoned,  good  quality 

Pine,  seasoned,  good  quality,  White. 
Spruce,  seasoned,  good  quality 


35,OU> 
100,000 


'-..'.' 

6,000  10,000 

],;,.,, 


(iranite 

Limestone 

Sandstone 

Brickwork,  ordinary,  cracks  with 

Cement,  American  neat,  6  months  old,  fair 
Cement,  Portland  neat,  6  months  old... 
Gravel... 


150 


100 
350 


750 
600 
300 
25 
100 
300 


490 
485 
450 
555 


52 
35 
23 
25 


168 
168 
150 
125 


100 


Diame- 
ter in 

Inches 


Weight  of  Bar  Iron 

EJ  POUNDS 

LENGTH,  1  FOOT 


2* 


s* 

3* 
3'i 


5 
6 

7 
8 
10 
12 


Square  Round 


0.2105 


. 

1.895 
3.368 
5.263 
7.578 


13.47 
17.05 
21.05 
25.47 
30.31 
35.57 
41.26 
47.37 


. 

121.3 
165.0 
215.6 
336.8 
4S5. 


0.1653 

0.6613 

1.488 

2.645 

4.133  i 

5.952 

8.101 

10.58 

13 .39 

16.53 

20.01 

BUJ 

27.94 

32.41 

37  JO 

42.33 

66.13 

95 .23 
129.6 
169.3 
264.5 
380.9 


WOODEN  PILLAES 


fj 

J  = 


4 

8 
12 
16 
20 
26 
32 
40 


Side  of  square  pine  pil- 
lar, in  inches 


10 


12 


BREAKING    LOAD 


Tons 

125.0 

90.8 

62.5 

43.4 

31.1 

20.1 

13.9 

8.9 


Tons 
204.2 
163.2 
122.2 
90.4 
67.6 
45.6 
32.3 
21.0 


Tons 
302.1 
255.1 

•j  ;.  i 


. 

63.0 
43.5 


Circumference  of  a  circle  equals 
the  diameter  multiplied  by  3.1416. 

Area  of  circle  equals  circumfer- 
ence multiplied  by  one-half 
radius. 

Area  of  triangle  equals  one-half 
base  multiplied  by  altitude. 

Area  of  similar  figures  are  to 
each  other  as  the  squares  of  their 
similar  dimensions. 

Area  of  sphere  equals  four  times 
area  of  great  circle. 

Volume  of  sphere  equals  one- 
third  of  the  radius  multiplied  by 
the  area  of  the  surface. 


WOODEN     BEAMS     TABLE 

Table  of  safe  quiescent  loads  for  horizontal  rectangular  beams 
of  white  pine  or  spruce,  one  inch  broad,  supported  at  both 
ends  and  loaded  at  the  center ;  together  with  their  deflec- 
tions under  said  loads. 


Depth 
of 

Ins. 

4 

8 
12 
16 
20 
24 


Span  6  feet 


load 

Ibs. 

200 

800 

1800 

3200 

5000 

7200 


dd 
tn& 

JB 
.11 
Ol 

.'•! 

M 


Span  12  feet  Span  16  feet  Span  20  feet  Span  30 feet 


load 

Ibs. 

100 

400 

900 

1600 

2500 

3600 


def. 

ins. 

.92 

.45 

.29 

.22 

.18 

.15 


load  I  def. 
Ibs.     ins. 

75     1.7 


300 
675 
1200 
1875 
2700 


load    def. 
Ibs.     ins. 


240 

540 

960 

1500 

21BO 


LI 


jn 


load     def. 
Ibs.     ins. 


160 
360 
640 
1000 
1440 


3.2 
2.0 
IJ 

1.2 
.96 


T  3t  B  Iv  E 

Showing  the  number  of  acres  of  covered  surface  (as  in  cities),  from  which  circular 
sewers,  with  junctions  properly  connected  by  easy  curves,  will  convey  away  the  water 
fall  of  a  rain  of  one  inch  per  hour  ;  with  house  drainage  besides.    This  is  a  very  heavy 
rain.    (This  table  is  introduced  here  to  aid  in  fixing  size  of  culvert  openings  in  pre- 
liminary surveys.) 

Weight  of  water  fresh  63.3  ;    salt  64.1  pounds  per  cubic  foot. 

WEIGHT    OF    CS.ST-IRO1M    WZS.TER-I»IF«ES 

As  used  in  Philadelphia  and  tested  by  hydraulic  press  before  delivery  to 
an  internal  pressure  of  300  pounds  per  square  inch. 

Diameter 

Thickness 

Weightper 
length 

Diameter 

Thickness 

Weight  per 
length 

Ins. 
4 
6 
8 
10 
12 

Ins. 

Vt 
A 

Lbs. 
211 
385 
460 
667 
899 

Ins. 
16 
20 
30 
36 
48 

Ins. 
% 

% 

1 

1H 

Lbs. 

1322 
1654 
3313 
5366 
9378 

INCLINATION,  PALL  OR 
SLOPE  OF  SEWER 

INNER   DIAMETER,   OH   BORE    OF    SEWER 
IN    FEET 

THICKNESS     OP    PLSNKS 

under  varying  heads  of  water 

2 

3 

4 

5 

6 

7 

8 

9 

10 

Stretch  in 
Feet 

HEADS    IN    FEET 

40 

30 

20 

10 

5 

Level  

Acres 

39 
43 
50 
63 
78 
90 
115 

Acres 

120 
135 
155 
203 
257 
295 
318 

Acres 

277 
308 
355 
460 
590 
670 
730 

Acres 
570 
630 
735 
950 
1200 
1385 
1500 

Acres 
1020 
1117 
1318 
1692 
2180 
2486 
2675 

Acres 
1725 
1925 
2225 
2875 
3700 
4225 
4550 

Acres 
2850 
3025 
3500 
4500 
5825 
6625 
7125 

Acres 

4125 
4425 
5100 
6575 

7850 

Acres 

5825 
6250 
7175 
9250 
11050 

4 

8 
12 

20 

m 

9 
13V4 

22  Vi 

Thi 

12^ 
20 

ckness  in  In< 
W% 
7 
10% 

17H 

:hes 
2?i 
B*j 

VA 
14 

| 

£ 

J4  inch  in  10  feet;  or  1  in  480... 
14  inch  in  10  feet;  or  1  in  240... 
%  inch  in  10  feet  ;  or  1  hi  160.  .. 
1     inch  in  10  feet  ;  or  1  in!20... 
1%  inch  in  10  feet  ;  or  1  in   80... 
2     inches  in  10  feet  ;  or  1  in  60.. 

DISCHARGE 

In  cubic  feet  per  second  for  each  foot  in  length  of  weir  in  thin  plate  and  with- 
out end  contraction,  by  the  Francis  formula  : 
DISCHARGE,  Q=3.33  L  H§=3.33  L  H  </H 

Head,  H, 
in  feet 

Cubic   feet 
per  sec. 

Head,  H, 

in  foi't 

Cubic   feet 
per  sec. 

Head,  H, 
in  feet 

Cubic   feet 
per  sec. 

0.10 
0.20 
0.30 

0.105 
0.298 
0.547, 

0.40 
0.50 
100 

0.842 
1.177 
3.3X0 

2.00 
2.50 

9.419 
13.163 

Practical  Electrical  Units 

Equivalent  Values  of  Electrical  and  Mechanical  Units 

Ampere  C        Volt  E       Ohm  K 

Unit 

Equivalent  Value  in  other  Units 

Unit 

Equivalent  Value  in  other  Units  ! 

Unit 

Equivalent  Value  in  other  Units 

C=2,    P=CE,     W=CEt=C*Bt=Pt, 

•->        -**             fta  Tt          ** 

p=Tr**~t  <**• 

Ampere,  the  unit  of  current  strength,  or  rate  of  flow,  repre- 
sented by  C. 
Volt,  the  unit  of  electro-motive  force,  electrical  pressure,  or 
<iifferen.ee  of  potential,  represented  by  E. 
i>!<ui,  the  unit  of  resistance,  represented  by  R. 
Watt  (ampere-volt,  or  volt-ampere),  the  unit  of  power,  P. 
Joule  (volt-coulomb),  the  unit  of  energy  or  work,  W. 

Relations  of  Various  Units 

K.  W. 
Hour= 

1,000  watt  hours. 
1.34  horse-power  hours. 
2,654,200  ft.-lbs. 
3,600,000  joules. 
3,412  heat-units. 
367,000  kilogram  metres. 
0.235,lb.  carbon  oxidized 
with  perfect  efficiency. 
3.53  Ibs.  water  evap.  from 
and  at  212°  F. 
22.75  Ibs.  of  water  raised 
from  62°  to  212°  F. 

H.  P.= 

746  watts. 
0.746  K.  W. 
33,000  ft.  -Ibs.  per  minute. 
550  ft.-lbs.  per  second. 
2,545  heat-units  per  hour. 
42.4  heat-units  per  minute. 
0.707  heat-units  per  second 
0.175  Ibs.  carbon  oxidized 
per  hour. 
2.64  Ibs.  water  67ap.  per 
It  ur  from  and  at  212°  F  . 

1 
Heat- 
unit= 

1,055  watt  seconds. 
778  ft.-lbs. 
107.6  kilogram  metres. 
0.000293  K.W.  hour. 
0.000393  H.  P.  hour. 
O.OOC0688  Ibs.  carbon  oxi- 
dized. 
0.001036  Ibs.  water  evap. 
from  and  at  212°  F. 

1  Heat-unit 
jper  Sq.  Ft. 

0.122  watts  per  squ're  in. 
0.0176  K.W.  per  sq.ft. 
0  0236  H.  P  per  sq  ft 

1  volt-ampere  —  1  watt—  1  volt-coulomb  per  sec,; 

f  =0.7373  foot-pound  per  secom 
=0.0009477  heat-units  per  second 

H.  P. 

Hour= 

0.146  K.  W.  Hours. 
1,980,000  ft.-lbs. 
2,545  heat-units. 
273,740  k.  g.  m. 
0.175  Ib.  carbon  oxidized 
with  perfect  efficiency. 
2.64  Ibs.  water  evapora'd 
from  and  at  212°  F. 
IT.Olbs.'water  raised  from 
62°  to  212°  F. 

1 
Jonle= 

0.000000278  K.  W.  hour. 
0.102  k.  g.  m. 
0.0009477  heat-units. 
0.7373  ft.-lb. 

Kilogram 
Metre= 

7.233  ft.-lbs. 
0.00000365  H.  P.  hour. 
O.OM00272  K.  W.  hour. 
0.0093  heat-nnits. 

^=J/746  of  one  horse-power; 
(  =0.7373  foot-pound, 
1  jonle  ..                     .                s  —  work  done  by  one  watt  in  one 

Ft.-lb. 

1.356  joules. 
0.1383  k.  g.  m. 
0.000000377  K.  W.  hours. 
0.001285  heat-unite. 
0  0000005  H.  P.  hour. 

lib. 
Carbon 
Oxidized 
I     with 
I  perfect 
Efficien'y 

14,544  heat  units. 
1.11  Ib.  Anth'cite  coal  ox. 
2.5  Ibs.  dry  wood  oxidzd. 
21  cu.  ft.  illuminating-gas! 
4.26  K.  W.  hours. 
5.71  H.  P.  hours. 
11,315,000  ft.-lbs. 
ISlbs.of  waterevap.  from 
and  at  212°  F. 

(  =0.0009477  heat-unit;       [second, 
1  I'.ritish  thermal  unit  =1055.3  j»ulea; 
f  =737.3  foot-pound  per  second, 
1  kilowatt,  or  1000  watts  -C  —0.9477  heat-units  per  second, 

1  Kilowatt-hour,                       (  =1.3405  horse-powers  hours, 
1000  volt-ampere  hours,             ^  =2,654,200  foot-pounds, 

Kilo- 
watt  = 

1,000  watts. 
1.34  horse-power. 
'4654,200  ft.-lbs.  per  hoar. 
44.240  ft.-lbs.  per  minute. 
737.3  ft.-lbs.  per  second. 
3,412  heatrunits  per  hour. 
56.9  heat-nnits  p'r  minute! 
0.948  heat-nnits  p'r  sec'd 
0.2275  Ib.  carbon  oxidiz'd 
per  hour. 
3.53  log.  water  evap.  per 
lir.  from  and  at  2)2°  K.I 

1 
Watt  = 

1  joule  per  second. 
0.00134  H.  P. 
3.412  heat  units  per  hour. 
0.7373  ft.-lbs.  per  second. 
0.0035  Ibs.  water  evap.  per 
hour. 
44.24  f  t.-lbs.  per  minute. 

1  horse-power..  .               ...  J  -'«  watts-_7*6  voltamperes. 

lib. 

Water 

0.2S3K.  W.  hour. 
0.379  H.  P.  hour. 
965.7  heat-units. 
103,900  k.  K.  m. 
1,019,000  joules. 
751,300  ft.-lbs. 
0.0664  Ib.  of  carbon  oxi- 
dized. 

^                                  )  =33.000  foot-pounds  per  minute. 

The  ohm,  ampere,  aiv  1  volt  are  delated  in  terms  of  one  another 
as  follows:  Ohm,  the  resistance  of  a  conductor  through  which  a 
current  of  one  ampere  will  pass  when  the  electro-motive  force  is 
one  volt.  Ampere,  the  quantity  of  current  which  will  flow  through 
a  resistance  of  one  Ohm  when  the  electro-motive  force  is  one  volt. 
Volt,  the  electro-motive  force  required  to  cause  a  current  of  one 
Ampere  to  flow  through  a  resistance  of  one  Ohm. 

1  Watt 
per  sq. 
in.  = 

8.19  heat-units  per  sq.  ft.  Evapor'd 
per  minute.                      from  and 
6,371  ft.-lbs.  per.  sq.  ft.   per]  at  212°  F. 
minute.                                     = 
0.193  H.  P.  persq.  ft.            1 

Weight*,   Lengths  and  Resistances    of   Copper  "Wire 

@  20°  C.,  68°  F. 

The    Circular     Mil 

Gages 

Diam- 

Area 

WEIGHT 

LENQTH 

11  Circular  Mil,"  the  "  Mil  "  being  the  name  for  the  one-thousandth  of  an  inch.    The  diameter,  there- 
fore, of  a  wire  expressed  in  mils  is  its  diameter  in  thousandths  of  an  inch    with  the  decimal  point 

.   . 

removed.    If  the  diameter  of  any  wire  expressed  in  mils  be  squared,  a  number  is  obtained  which  is 

Inches 

Circular 
mils 

Lbs.  per 
Foot 

Lbs.  per 
Ohm 

Feet  per 
Pound 

Feet  per 
Ohm 

proportional  to  the  actual  area  of  the  wire  itself,  and  is  termed  the  "  circular  millage  "  of  the  wire. 
Any  given  wire  may  bo  regarded  as  made  up  of  a  number  of  small  circular  unit  wires,  one  mil, 
or  one-thousandth  of  an  inch  in  diameter.    If  the  diameter  of  the  given  wire  is  ten  small  circles  long,  it 

A.W.G. 

B  &  S 

is  ten  mils  in  diameter.    The  square  of  ton  being  100,  the  circular  millage  of  this  wire  should  be  100 

circular  mils.    As  tha  area  of  a  circle  is  the  square  of  its  diameter  multiplied  by  .7854  in  order  to  con- 

UOOO 
000 

0.460 
0.4096 

211,600 
167,800 

0.6405 
0.5080 

13,090 
8,232 

1.561 
1.969 

20,440 
16,210 

vert  the  circular  millago  of  any  wire  into  its  actual  area  in  square  inches,  the  circular  millage  must  be 
multiplied  by  .7854,  and  the  requisite  decimal  places  pointed  off.    Thus,  in  the  previous  example,  a  wire 
of  100  circular  mils  has  an  actual  area  of  .7854  x  100  =  .00007  square  inches.    Inasmuch  as  the  circular 

00 
0 

0.3648 
0.3249 

133,100 
105,500 

0.4028 
0.3195 

5,177 
3,256 

2.482 
3.130 

12,850 
10,190 

millage  is  proportional  to  the  actual  area  in  square  inches  of  the  wire,  it  forms  an  exceedingly  easy  and 
convenient  number  for  the  purposes  of  calculation,  and  ia  widely  used  in  this  connection. 

1 

0.2893 

83,690 

0.2533 

2,048 

3.947 

8,083 

2 

0.2576 

66,370 

0.2009 

1,288 

4.977 

6,410 

Electrical  Conductivity  of  Different  Metals  and  alloys 

3 

0.2294 

52,630 

0.1593 

810.0 

6.276 

5,084 

Pure  silver  .100              Telephonic    silicions                   Aluminum  brouzo  (10  '?  )  12.6 

4 

5 

0.2043 
0.1819 

41,740 
33,100 

0.1264 
0.1002 

509.4 
320.4 

7.914 
9.980 

4,031 
3,197 

Pure  copper                     100                  bronze                             35               Siemens  steel            _         12 

Refined  and  crystallized                   Copper  with  10  %  of  lead    30               Pure  platinum                   10.6 

copper                  .    .       99.9             Purezinc    29.9             Copper  with  10  )*  of  riickellO.6 

o 

01620 

26250 

007946 

201  5 

12  58 

2  535 

Telegraphic  silicious                   Telephonic     phosphor-                     Purelead                        .    8.88 

0.1443 

20,820 

0.08302 

126.7 

15.87 

2,011 

bronze              .               98                  bronze.    29               Bronze  with  20  jl  tin  8.4 

Alloy  of  copper  and  sil-                   Silicious  brass,  25  %  zinc    26.49          Pure  nickel          ..         _    7.89 

s 

0.1285 

16,510 

0.04998 

79.69 

20.01 

1,595 

ver(50)6)                          86.65           Brass  with  35  $  of  zinc  .  21.5             Phosphor-bronze,  10  £  tin   6.5 

9 

0.1144 

13,090 

0.03963 

50.12 

25.23 

1,265 

Pure  gold                             78                Phosphor  tin...               .17.7             Phosphor-copper,  9jfphos.  4.9 

10 

0.1019 

10,380 

0.03143 

31.52 

31.82 

1,003 

SilicideofCopper.ijfSY  75               Swedish  iron                     16              Antimony  3.88 

Pure  aluminum    1..         54.2            Pure  Banca  tin.  .  15.45 

11 

0.09074 

8,234 

0.02493 

19.82 

40.12 

795.3 

12 

0.08081 

6,530 

0.01977 

12.47 

50.59 

630.7 

13 

0.07196 

5.178 

0.01568 

7.840 

63.79 

500.1 

INSULATORS    (J*oor    Conductors) 

14 

0.06408 

4,107 

0.01243 

4.931 

80.44 

396.6 

Dry  Air                       Resins                        Glass                              India-rubber              Dry  Leather 
Shellac                       Sulphur                      Mica                               Silk                             Porcelain 

15 

0.05707 

3,257 

0.009858 

3.101 

101.4 

314.5 

Paraffin                      Wax                            Ebonite                         Dry  Paper                  Oils 

16 

0.05082 

2,583 

0.007818 

1.950 

127.9 

249.4 

Amber                        Jet                              Gutta-percha                Parchment 

INDEX 


SECTION 


PAGE  SECTION 


PAGE 


05 

ffi 


fi    ;j?ff 

q     |l;l 


s  :§§ 

3 


KX 


F 


K 


aS 

<  x 

-     OS 


W 

s 

fcj 


O 
O 

M 


li 


H 

'     '! 


rc  ^7199 


